A fossa is a shallow depression on a bone surface.

Correct Answer: A

Rationale: A fossa is a shallow depression on a bone (e.g., olecranon fossa), per anatomical terminology, for articulation or muscle attachment. This is correct, making 'True' the answer.

Correct Answer: A

Rationale: The patella, a sesamoid bone, is the kneecap, protecting the knee joint. This is standard terminology, making 'True' correct.

Correct Answer: B

Rationale: Dorsiflexion is ankle flexion toward the shin (e.g., toes up), not exceeding 180°. Hyperextension is beyond 180°, making 'False' correct.

Correct Answer: B

Rationale: The axial skeleton includes 80 bones (skull, vertebral column, thoracic cage) in the central body, not extremities. The appendicular has 126 bones at extremities. '100' and '126' are incorrect, making 'Consists of 80 bones which are located in the upper central part of the body' accurate.

Correct Answer: C

Rationale: Long bones (e.g., femur) primarily act as levers for muscle movement (e.g., walking) and provide support (e.g., weight-bearing). A is broad, B is more flat bones, and D is cartilage/joints, making 'Act as levers for muscles and to provide support' correct.